Plate fastening device



i Patented ocr. 1o, 193e UNITED STATES "PATENT .or-FICE PLATE FAsTENlNG Davrca e Homer R. Bosenberry, Euclid, Ohio, assignor to' The Cleveland Pneumatic Tool Company,

Cleveland, Ohioya corporation of Ohio Application Auguste?, 193s, serial Nn. zealand s claims.. (ci. ass- This. invention relates `broadly to devices for provisionally securing together perforated plate- I like elements with their perforations in vertical alignment preparatory to the riveting thereof.

5 One object of the invention is to produce imyprovem'ents inthe plate fastening Vdevice de` scribed and claimed in the copending applica- 120 Other objects and features of-this ,inventionl will .appear more .clearly fromithe V`following description :and drawing of whichz' y Fig. 14 is a longitudinal sectional view o'f -the device shown in the process of assembly.

device completely assembled.

Fig. 3 is a cross sectional view taken in a plane indicated by the line 33 of Fig. 1.

Fig. 4 is a cross sectional view taken in a plane 3Q indicated by the line 'I-I in Fig. 2. Fig. 5 is a view similar to Fig. 2 showing the device in the position assumed when applied tof the work.

' Y Fig. 6 is a view of the device in operative psl tion. l

Fig. 7 is an enlarged cross sectional view taken .in a plane indicated by line l-l in Fig. 5.

Referring to the drawing, I0 representsa cupshaped housing having the bottom wall 4il thereof forming an externalA annular ilange I2, while the upper end o'f the housing is provided withfa 'similar flange i3. Depending from the bottom wall Il, there is a stem Il eccentrically disposed relative to the center axis ofthe vhousing and oi!v crescent-shape cross section resulting from the drilling of a central bore or orifice l5, through the bottom wall il. f

' Slidable within the housing I0, there is a pin i6 formed with an upper enlargement Il terminated by a head or annular seat Il. The normal i diameter of the pin I6 is preferably substantially equal to that of the drilled bore I5 and to that of the rivet perforations or rivet holes I9 formed through the work, which vwork is represented on 455` the drawing as two superposer! plates 2li.y The free end of the pin is pointed as at 2l for facilitating the insertion of the pin through the periorations 20. Intermediate its ends the pin I6 is machined into a reduced portion 22 of a substantially oval 5 shape cross section which cooperates with the crescent shaped cross section of the stem i4 to form therewith a circular cross section shown in Fig. 7, Vwhich cross-section ,is of a diameter substantially equal to that of the rivet holeslS. 10 This reduced portion 22 is terminated by a step 22' .and by a step or lateral projection 23, -the purpose of which will be explained later.

The-housing Ill is of adequate size to accommodate a compression-spring 24 surrounding the l5 pin and having one4 end resting on Vthe! bottom wall Il of ythe `housing Il), which walliorms an uninterrupted yseat for the spring, whilethe other endfis seated on the annular seat I8 of the 'pin I6; The .spring 24 is also designed to t 20 closely onfthe enlargement vI1 ofthe pin I6 and within the housing Il), :thereby acting as a guid ing `bushing for the vpin :for preventing lateral movement of the pin relative to the housing. 25 Fig. 2 is a. view similar to iFig. i1,.sho,wig the 'After the pin' I6 and the spring 24 have been 25 assembled in the housing Il as shown in Fig. l, the ilange I2 together with the bottom wall of the housing is laterally instruck as at 25 for closing the bore i5 around the pins reduced portion 22 as shown in Fig. 4, thereby changing the 80 circular cross sectional shape of the bore I5 into a substantially oval shape, and providing a stop 25 engageable byv theprojection 23 of the pin I6 for preventing the removal of the pin from the "housing I0.

Preferablyfglued on or otherwise aiilxed to the I bottom wall I I of the housing l0, there is a butler or washer 26, the center hole of which is large enough to enable engagement of the projectionA 2l with the stop 25'. In practice this buier may 40 be made .of either rubber, cork, felt, leather, or other vsimilar material intended to protect the work from being marred or dented by the housing while in operative engagement therewith as hereinafter explained.

In the operation,thedevice is applied to the work by ilrst positioning the pin within the housing Il, as shown in Fig. 5. To that. end, pressure ny i' means of avplier like tooliisapllied yin opposite directions on the annular ilang'eil lof the housing 60 I0 and on the head" I8 of the-pinfl, thereby compressing the spring 2l andcausing i;m e shoulder 23 of the pin I6 to protrude beyond t e free end i of the stem Il a. distance somewhat greater than the combined thickness ofsthe plates 2li.v This l5 outward slidable movement of the pin is limited by the engagement of the step 22' with the stop 25'. Thereafter the protruding portion of the pin is inserted through the perforations 20 and moved laterally to bring the stem Il into align-r the pin and cause clamping of the plates between thebottom wall I I, or its component buffer 26, and the projection 23 of the pin I5. Due to the circular cross section formed by the stem I 4 and the reduced portion 221 of the pin I6, which cross-section is of a diametersubstantially equal to that of the perforations I9, the upper and lower plates 20 will provisionally be held together with their perforations 'in perfect coaxial alignment for receiving the rivets intended to permanently secure the plates together.

To remove the device, pressure is again applied on the housing i and pin I6 in the manner above referred to, thereby compressing the spring 24 and enabling removal of the device' from the work. I

From the foregoing it will be understood that due to the buffer 25 being secured to the lower side of the bottom wall II, direct contact of the housing with the work is prevented, thereby overcoming the difficulty heretofore encountered with this type of device wherein` the housing due to the pressure of the spring acting thereon was found to mar or dent the work. In practice where the device is used with relatively thin aluminum plates or the like, the marring of the work was objectionable not only from a matter of appearance but because the detents resulting from lthe pressure of the housing on the work was found to create abnormal stresses leading to crystallization and often breakage of the plates.

By providing the bottom wall with an oval shaped bore equal in cross section to thecross section of the reduced portion of the pin, which bore, it has been explained, is obtained by the flange I2 being instruck. a simple and effective Alock is provided for preventing accidental removal of the pin from the housing.

Although the foregoing description is necessarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specic terminology is not intended to be restrictive or confining and it is to be further understood that various rearrangements of parts and modification of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

1. A removable rivet for provisionally securing at least two superposed perforated plates together, comprising a substantially, cup-shaped housing, a bore through the bottom of said housing formed with a rigid inner wall relative to the housing, a pin siidable within said housing, a reduced portion intermediateithe ends oi' said pin slidable through said bore in guided engagement with the inner wallthereof, a lateral projection on said pin engageable with said housing for limiting slidable movement of said pin in one direction, said projection being insertable through the perforation of the plates for engagement with the underside of the under plate, a stem depending from said housing partly surrounding said pin to form with the reduced portion thereof a. circular cross-section, said stem being insertable into said perforations to`cooperate with the reduced portion of said pin for maintaining said perforations in coaxial alignment, a seat within said housing contacting the periphery of the reduced portion of said pin, a seat on said pin, and a compression spring operatively eli-'- gaging said seats for effecting the clamping of the plates between said housing and the projection on said pin.

2. A removable rivet for provisionally securing at least two superposed perforated plates together, comprising asubstantially cup-shaped housing having a bore through the bottom thereof of oval-shaped cross section, a laterally instruck portion within the bottom wall of said housing forming a part of the inner wall of said bore, a pin slidable within said vhousing formed with a reduced .portion slidable through said bore in guided engagement with the inner wall thereof against rotation relative to 4said housing, a lateralprojection onsaid pin engageable with said instruck portion for limiting slidable movement of said pin in one direction, said projection being insertable through the perforation of the plates for engagement with the underside of the under plate, a stem depending from said housing partly surrounding said pin, said stem being insertable into said perforations to cooperate with the reduced portion of said pin for maintaining said perforations in coaxial algn` ment, a seat within said housing and on said pin, and a compression spring operatively engaging said seats for effecting the clamping of said plates between said housing and the projection on said pin.

3. A removable rivet for provisionally securing at least two superposed perforated plates together, comprising a substantially cup-shaped housing, a bore through the bottom of said housing, a reduced portion intermediate the ends of said pin slidable through saidbore, a lateral projection on said pin, a laterally instruck portion on said housing extending into said bore to form a portion of the inner wall thereof, said instruck portion being engageable by said projection for limiting slidable movement of said pin in one direction, a stem depending from said housing partly surrounding said pinysaid stem being insertable into said perforations to cooperate with the reduced portion of said pin for maintaining said perforations in coaxial alignment, and a compression spring within said housing acting on said pin for effecting clamping of said plates 

